还以为你说数学课本呢。不好的课本真让人头疼。文科历史的课本，说lie大概也严重点。立场角度不同是会有分歧。

来源: monochrome 于 2013-12-06 11:53:35 [旧帖] [给我悄悄话] 本文已被阅读：次

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